보조지표 합치기, 분리, 복사하기 기능 오류 수정

frontend/src/utils/indicatorChartSync.ts

@@ -1,4 +1,5 @@
 import type { IndicatorConfig } from '../types';
+import { layoutKey } from './indicatorPaneMerge';
 
 export type IndicatorChartSyncMode =
   | 'none'
@@ -6,6 +7,7 @@ export type IndicatorChartSyncMode =
   | 'add-only'
   | 'params-changed'
   | 'reorder-only'
+  | 'layout-changed'
   | 'full';
 
 export interface IndicatorChartChange {
@@ -62,6 +64,9 @@ export function classifyIndicatorChartChange(
   };
 
   if (removedIds.length === 0 && added.length === 0 && paramsChangedIds.length === 0) {
+    if (layoutKey(prev) !== layoutKey(curr)) {
+      return { ...empty, mode: 'layout-changed' };
+    }
     const sameSet = prev.length === curr.length
       && prev.every(p => currMap.has(p.id));
     if (sameSet && prev.map(i => i.id).join(',') !== curr.map(i => i.id).join(',')) {
@@ -70,6 +75,15 @@ export function classifyIndicatorChartChange(
     return empty;
   }
 
+  /** 병합·분리 등 mergedWith 변경 — params 키에도 잡히지만 pane 재배치가 필요 */
+  if (
+    removedIds.length === 0
+    && added.length === 0
+    && layoutKey(prev) !== layoutKey(curr)
+  ) {
+    return { ...empty, mode: 'layout-changed', paramsChangedIds };
+  }
+
   if (removedIds.length > 0 && added.length === 0 && paramsChangedIds.length === 0) {
     return { ...empty, mode: 'remove-only' };
   }